CT connection (easy connect method). Gems 3500 is directly connected to a large number of CTs, so use the RJ12 connector to make connection more convenient. You can either use a CT with RJ12 terminals applied or an ordinary CT combined with an RJ12 connection adapter. / Color : 1. White, 2. Black, 3. Red, 4. Green, 5. Yellow, 6. Blue. / EASY CONNECT has special connectors to facilitate connection with CT.
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